Micrometer-gage



E. E. CIHA.

MICROMETER GAGE.

APPLICATION FILED FEB.20.1918.

Patented Oct. 14, 1919. 3 SHEETS-SHEET lnlllllllllllmpmllll E. E. CIHA.

- MlcoMf-:TER GAGE.A

APPLICATION FILED FEB. 20| |918.

1 3 l 81,726 Patented Oct. 14, 1919.

3 SHEETS-SHEET 2.

E. E. CIHA.

MlCROMETER GAGE.

APPLxcATIoN FILED FEB. 20. 191s.

Patented Oct. 14, 1919.

3 SHEETS-SHEET 3.

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EDWARD CIHA, OF CHICAGO, ILLINOIS.

v MIcnomETEn-GAGE.

Specification of Letters Patent.

Patented Oct. 14, 1919.

Application led February 20, 1918. Serial No. 218,213.

To all whom, t may concern: y

Be it known that I, EDWARD E. CIHA, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Micrometer-Gages, of which the following is a description.

My invention belongs to that general class of devices known as micrometer gages and relates particularly to a gage suitable for various sizes and kinds of work. More particularly it relates to a gage of the kind described having separable heads which may be rigidly secured together the desired distance apart, the construction being such that the distance between the heads may be such as desired for the particular work in hand. The invention has among its objects the production of a device of the kind descrlbed `that is simple, inexpensive, durable, compact, eflicient and satisfactory for use whereever found applicable. It has also among its objects the production of a gage that may 'be used to do the work ordinarily required by a number of diHerent sizes. Among its further objects is the production of a gage that may be easily changed to Ado various kinds of gaging for which special gages are ordinarily provided. Many other objects and advantages of the construction herein shown and described will be obvious to those skilled in the art from the disclosure herein given.

In the drawings, wherein like reference characters indicate like or corresponding parts,

Figure 1 is a sectional view of a gage embodying Iny invention;

Fig. 2 is a sectional view taken substantially on line 2 2 of Fig. 1;

Fig. 3 is a sectional view taken substantially on line 3 3 of Fig. l;

Fig. 4 is a sectional View taken substantially on line 4-4 of Fig. l;

Fig. 5 is an end view if one of the spacers;

Fig. 6 is a side elevation of a spacer similar to that shown in Fig. 1, of slightly greater length;

Fig. 7 is a side elevation of a depth gage showing one of the heads removed and another form of head arranged thereon;

Fig. 8 is a bottom elevation of the same;

Fig. 9 is a side elevation of a moditied measuring point;

Fig. 10 is a partial sectional view of another form of measuring point;

Fig. 11 is a sectional view of a portion of another construction illustrating a different form of micrometer shaft;

Fig. 12 a sectional view through the end of'the micrometer screw barrel and safety controllingmember therefor;

Fig. 13 1s` a sectional view taken substantlally on line 13-13 of Fig. 12; and

Fig. 14 is a perspective view of a portion of another form of sleeve.

Referring to the drawings, 1 and 2 represent the two head or frame partsof the micrometer,A the same being of suitable size, form and material, which are secured together by a bolt 3, or its equivalent, provided with a head 4 at one end and with a nut 5 at the other end, or their equivalents. The bolt 3 is preferably square, hexagonal or of an equivalent form, for a portion of its length where it engages the head parts 1 and 2, so that the parts are prevented from turning thereon and are maintained in alinement. Arranged between the parts 1 and 2 on the rod 3 is a spacer 6, it being understood that the spacer is of the desired length and size and that one or more may be provided on the rod 3 so as to maintain the head parts 1 and 2 the desired distance apart. In the preferred construction, however, the spacer is arranged to positively engage the head parts, 1 and 2 at each of its ends S0 that they are maintained in relative alinement by the spacer as well as by the rod 3, and prevented from turning. In the construction shown in Figs. l to, the spacer 6 is formed with teeth or serrations, or the equivalent, arranged to engage with the head parts. I have shown the serrations 10 on the head parts formed in plates or washers 8, which are maintained in operative relation with the head arts by the pins 9, or their equivalents. O viously the teeth or serrations might be made directly in the parts 1 and 2, if preferred. In Fig. 6 a similar spacer 6 with serrations 7 at each end is shown. This spacer, however, is slightly longer, it being understood that with the device is provided a suiicient number of spacers of various sizes to afford a number of adjustments by using one or more parts to make up the desired distance. It will be noted, by referring to Fig. l, that I provide shoulders l1 and 12 against which the head 4 and nut 5 abut.

Carried by one of the head parts, as shown in part 2, is a micrometer shaft 15 formed with threads at the ends 16 of the desired pitch arranged to engage a sleeve 17 secured to the head 2. Carried by the threaded shaft 16 at the free end and spaced therefrom is a 'barrel 18, the same being secured to the end 19 of the threaded shaft 16. I preferably provide a knurled portion 20 on the barrel so that the barrel and shaft may be conveniently rotated. The parts 17 and 18 are provided with graduations 31 and 32 similar to any of the well known types of micrometer gages. Carried by the other head part, as shown in part 1, and in alinement with the end 21 of shaft 15 is a measuring point 23 having a suitable face 22. Point 23 is provided with an extending part 24 preferably in threaded engagement with part 1, a portion of the same being cut away, however, at 25 for the reception of the locking screw 26. The same is also shown provided with a knurled head 27 rigidly but removably secured thereto. One end of the point 23 is split and the knurled head sprung thereover. By removing the screw 26 the measuring point 23 may be slightly adjusted to allow for wear, so that the zero points are always together when faces 21 and 22 are in contact. In order to lock shaft 15 in a desired position and prevent its accidental turning or displacement, I provide a locking member 28 which is formed with a slot 30 through which projects a pin 29, or the equivalent. By referring to Figs. 1 and 3 it will be o'bvious that turning member 28 in one direction or the other will cause member 28 to frictionally engage and bind on shaft 15 and lock the same against accidental movement.

In order to prevent the barrel 18 from being turned and forcing the faces 21 and 22 into contact to such an extent that the threads on the shaft end 16 might be injured,

I provide a safety controlling or turning device on the end of the barrel so that when the faces 21 and 22 are brought into contact with the two zero points registering, or the two faces are brought into engagement with the work to be gaged, the threads will not be accidentally stripped. For this purpose I provide a part 33 pivotally carried by part 34 arranged in the end 19. As shown, part 34 is formed with a lug 35 which is in threaded engagement with the end 19 of the micrometer shaft.

It will be noted that a chamber is formed between the parts 33 and 34 and within this chamber is arranged a spring pawl 36, same being secured in place by a screw 37, or its equivalent. The spring 36 is provided with a part 38 arranged to engage teeth on the part 34 and is also provided with a lug 39 in engagement with the part 33, so that the part 36 will turn with the rotatable part 33. Obviously if the shaft 15 is turned into contact with the work at the end of face 21 by means of the member 33 as soon as face 21 comes into contact with the face the part 38 will ride on the teeth on part 34 without turning the barrel 18. The frictional or yielding engagement between parts 33 and 34 is sufficient, however, for moving the micrometer shaft into proper engagement with the work to give an accurate reading.

In the construction shown in Fig. 7, the part 2 and parts carried thereby are Similar to those shown in Fig. 1. For the part 1, however, is substituted a part 44 provided with a foot having a face 42. In this case 43 is the equivalent of the rod 3, 45 the equivalent for the nut 5 and spacer 46 the equivalent for the other spacers'described. Vith this construction a suitable depth micrometer gage is provided as will be obvious by referring to the figure. By providing the measuring point 23 at one end of the foot, the foot may be swung around so that the measuring point is brought under the shaft 15, and in this case the gage may -be used similarly to that shown in Fig. 1. In Fig. 9 is illustrated a modified form of measur ing point 48 threaded as at 47 to engage the head orframe part similar to the measuring point 43.

A modified construction of shaft 50 is shown in Fig. 10 in which the shaft is provided with a tapered end 51 and the measuring point 49 with a V-shaped groove. With this constructionthe depth of threads may be determined accurately. In the construction shown in Fig. 11 the shaft is provided with a reduced end 52, 53 being a shoulder at the juncture of the parts. This makes a very convenient depth gage. In the construction shown in Fig. 14, 56 represents a spacer which is substantially similar to the spacer 6 shown in Fig. 1, except that the same is provided with lugs 57 arranged to engage coperating recesses in the head parts. I have not considered it necessary to illustrate the head parts as constructed for this form of spacer, as the style of recess in the same to secure lugs 57 will be obvious.

Having thus described my invention it is obvious that various immaterial modifications may be made in the same without departing from the spirit of my invention, hence I do not wish to be understood as limiting myself to the exact form, arrangement, construction and combination of parts herein shown and described or uses mentioned.

What I claim as new and desire to secure by Letters Patent is: 1. In a gage of the kind described, andin comblnation, a pair of coactin jaw members and means for securing sald `jaw members together comprising a rod connected at one end to one member and at the other end to the other member, a spacing member mounted on the rod between said jaw members, and means providing for a positive interlocking connection between the spacing member and jaw members to prevent relative movement of said members.

2. In a gage of the kind described and in combination, a pair of co-acting jaw members and means for securing said jaw members together comprising a rod connected at one end to one member and at the other end to the other` member, and a spacing finember detachably mounted on said rod between said jaw members, and means on the jaw members and the spacing member at each of its ends providing for a positive interlocking connection between the spacing member and the jaw members at each'of its ends to prevent relative movement of the spacing and jaw members.

3. In a gage of the kind described and in combination, a pair of co-acting jaw` members, and means for securing the jaw members together comprising a rod connected at one end td one member and at the other end to the other member, a plurality of spacing members'mounted on the rod between the jawvmembers, and means on the jaw lmembers and each spacing member at each of its ends providing for a positive interlocking' connection between the spacing members and the jaw members to prevent relative movement of the jaw members. j

4. In agage of the kind described and in combination, a pair of co-acting jaw members and means for securing said jaw members together comprising a rod connected at one end to one member and at the other end to the other member, a spacing member mounted on said rod between saidjaw members, said spacing member arranged to interengage the jaw members at each of its ends and prevent relative movement of the spacin and jaw members, one jaw member provi ed with an adjustable member having an engaging inner face, the other jaw member provlded with an adjustable shaft arranged to coperate with said face, actuating means for said shaft inoperative to actuate the shaft after engagement of the shaft with` the work between the inner face and rod, said means including a stem extending from the rear end of said shaft, a finger piece rotatably mounted upon said stem, a ratchet face on the end of the shaft, and a spring pawl mounted upon said stem between the inner end of the linger piece and the ratchet face of the shaft.

5. In a gage of the kind described and in combination, a pair of co-acting jaw members and means for adjustably securing said jaw members together comprising a rod connected at one end to one member and at the other end to the other member, a spacing member detachably mounted on said rod between said jaw members, one jaw membe:

provided with an adjustable member Hfaving' a-n engaging inner face, the other jaw member provided With an adjustable shaft arranged to coperate with said face, and means for locking said shaft against movement comprising a member mounted on the shaft, and having an eccentric slot at one side thereof, and a pin carried by the jaw member engaging said member in said slot.

In testimony whereof, I have hereunto signed my name in the presence of two vsubscribing witnesses.

EDWARD E. oiHA.

Witnesses:

ROY W. HILL, CHARLES I. COBB. 

